Look at: > library(fortunes) > fortune(69)
-- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare [EMAIL PROTECTED] (801) 408-8111 > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Rolf Turner > Sent: Thursday, August 14, 2008 4:07 PM > To: R-help Forum > Subject: [R] Department of Redundancy Department. > > > I just noticed a certain ``usage'' in a recent posting, and > couldn't restrain my self from commenting. The usage was of the form > > ``if(X==TRUE)'' > > where X was a logical variable. > > This sort of thing is brought to you by your Department of > Redundancy Department. The ``==TRUE'' bit is irrelevant, > incompetent, and immaterial, as Perry Mason used to say. The > value of X==TRUE is exactly the same as the value of X when X > is a logical variable. If X is not a logical variable a lot > of strange things can happen, depending on the nature of X. > > It is safer and takes 6 fewer key strokes to use ``if(X)''. > So why not do that, eh? > > cheers, > > Rolf Turner > > P. S. The example that triggered this post actually used > ``if(X==T)''. > This is doubly dangerous since ``T'' can be overwritten. If > it was overwritten you'd get toadally wrong answers. E.g., > suppose you had set > > T <- FALSE # !!! > > ***ALWAYS USE ``TRUE'' AND ``FALSE'' FOR LOGICAL VALUES. > DO NOT USE ``T'' AND ``F''.*** > > ###################################################################### > Attention:\ This e-mail message is privileged and > confid...{{dropped:9}} > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
